Indicator for elevators



(No Model.)

R. GHALLIS. INDICATOR FOR ELEVATORS.

No. 539,361 Patented May 14, 189.5.

Z gnvemfo'c ATENT stron ROBERTOHALLIS, OF WILKES-BARRE, PENNSYLVANIA.

INDICATOR FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 539,351 dated May 14,1895.

Application filed March 16, 1896. Serial No. 542,036. (No model.)

To aZZ whom it may concern:

Be it known that I, ROBERT CHALLIS, a citizen of the United States,residing at Wilkes- Barr, in the county of Luzerne and State of 1Pennsylvania, have invented certain new and useful Improvements inIndicators for Elevators, of which the following is a specification.

cater for a series of landings that it may be readily adjusted to suitany change in the length of the cable, such as might be brought about bysplicing a break.

To these ends the invention consists in a structure which I shall nowproceed to describe, reference being had to the accompanying drawings,in which- Figure 1 is a side elevation of a cylindrical drum providedwith my improved indicator. Fig.2 is an end view of' the same, one ofthe standards of the indicator being broken away; and Fig. 3 is anenlarged section of the indicator-frame on the line 3 3 of Fig. 1.

Referring to the drawings 1 indicates the hoisting drum of an elevatorsuch for instance as those used in mine shafts. These drums are usuallyoperated by a pair of engines connected directly to the shaft 2 uponwhich the drum is mounted, but I have not considered it necessary toillustrate the engines or the.

shaft bearings for the purposes of the present specification.

It may be here remarked that my invention is equally applicable toconical winding drums and to drums provided with a spiral guide groovefor the rope. In the present instance the drum is shown as having aplain surface,

the rope 3 being connected with it at one end and winding in a spiraltoward the other.

Near each end of the drum is a standard 4 which is preferably adjustablevertically. As shown the standards fit in hollow posts 5 which are setin the masonry of the hoisting venient for the engineer to observe.

apparatus, and set screws 6 are provided for holding the standards inany desired adjustment. These standards support a bar or bars 7 uponwhich is adjustably carried a second bar 8 provided with indicators 9.The indicators are so spaced on the bar 8 that when the middle of thelast coil of rope on the drum is opposite an indicator the cage orplatform of the elevator will be at the landing corresponding to theindicator. The numbers or names of the several landings are designed tobe marked on their corresponding indicators. Thus in the drawings thelandings are indicated by the letters A, B, G, &c.

As shown in the drawings the indicator bar 8 is a piece of angle ironhaving its horizontal flange resting upon two separated supporting bars7 also consisting of angle irons having horizontal and vertical flanges.The adjustable bar 8 is clamped to the bars 7 by means of boltslO andthumb nuts 11. The indicators 9 have their lower ends riveted to orotherwise securely attached to the bar 8 and their upper ends pointedand close to the rope as it is wound on the drum.

The hoisting rope stretches from use and occasionally it requiresrepairs, but if the indicators are correctly placed on the adjustablebar 8 they will all indicate correctly if one of them is properlyadjusted after each changein the rope. The adjustment, as illustrated,simply requires that the thumb nuts be loosened and afterward tightenedwhen the bar Sis moved to its proper position. The adjusting can bereadily made by observing when the car or platform is at the landingnearest to the hoisting drum and then setting the indicatorcorresponding to said landing so that its point is opposite the middleof the last coil of rope.

Instead of the arrows or pointers 9 I may substitute any other form ofindex or marker upon the rod 8.

The adjustable standards 4 permit the indicator to be adjusted to theheight most con- These adjustable standards also permit a very fineadjustment of the indicator points relative to the rope, as the pointsmove vertically while the rope is inclined or spiral.

I have described my invention in the sim-' plest and most effectiveform. hitherto devised ICO by me, butit will be eyident that themechanical details of the invention may be considerably varied withoutdeparting from the scope and spirit thereof.

Therefore, without limiting myself to the precise construction andarrangement of parts shown and described, I claim- 1. The combinationwith a hoisting drum and its rope, of a bar supported parallel with thedrum and a series of indicating points supported on the bar,substantially as described.

22. The combination with a hoisting drum andits rope, of a barsupportedadjacent to and adjustable lengthwise of the drum and a series ofindicating points or markers upon said adjustable bar, substantially asdescribed.

3. The combination with a hoisting drum and itsrope, of standards ateach end of the drum, a bar or bars extending between the standardsandparallel and adjacent to the drum, an indicator bar adj nstablysupported upon said bar or bars and a series of indicating points ormarkers fixed upon the indicator bar, substantially as described.

4. The combination with a hoisting drum and its rope, of Verticallyadjustable standards near each end of the drum, a supporting bar carriedby the standards parallel and adjacent to the drum and an indicator barprovided with indicating points or markers and adj u stably carried bythe said supporting bar, substantially as described.

In testimony whereof I aifix my signature in presence of two witnesses.

ROBERT CHALLIS. Witnesses:

H. S. BEETS, 'lHos. l-I. HOLMES.

